Re: Off nights - is it just me?
Its TOTALLY normal.
Sometimes for reasons....never discovered.
Often, because there is a normal disconnect/time lag between body and mind in terms of integrating stuff.
In terms of hamstrings, there may be chronic imbalances between your quads and hamstrings causing your pelvis to be pulled and worsening the hamstrings tightness, or it may come from tight Achilles tendons and plantar issues - you may want to check with a PT or athletic trainer or myofascial therapist.